Effects of sheet pile driving on soil density within soil exchange drillings
Effects of sheet pile driving on soil density within soil exchange drillings
For the overhaul of a major port construction soil exchange drillings using large diameter cased boreholes were carried out along the wall alignment to support the installation process of the subsequent pile driving. In order to minimise the environmental impact, the exchange drillings were backfilled using the excavated drilling material. If the material was deemed unsuitable, sand from an offshore depot was used instead. During the pile driving several of the king piles sank up to 9 m into the ground with minimal application of driving energy. An extensive investigation was launched to identify the cause of these failures. Different fill materials as well as backfilling methods of the exchange drillings were investigated using before and after cone penetration tests (CPT). In order to assess the structural integrity of the driven king piles, CPTs were carried along the wall alignment, adjacent to and within the double beam piles. This paper presents the findings of the above-mentioned investigation focussing on the installation effects of the pile driving on the soil density within the exchange drillings. The CPT results suggest a sufficient compaction of the fill material due to the pile driving process even in areas where the piles initially sank into the ground.
Ulf Matthiesen; Martin Pohl
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
D - Current and new construction methods
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